I have a 01 996 C2 tip with 49,000 miles on it. I've owned it since 15,000 miles and the transmission fluid has never been changed. I track the car about 15 days each summer. When is the fluid to be replaced and should I do it sooner since I track my car? I called up the dealer and they wanted 450 bucks. That seems outrageous. Is this something you can DIY. I do all my own brake work, of course this is easy. Thanks.

 

DIY. Not hard. Easy as changing out Diff Fluid.

 

There's a complete DIY with diagrams over on RennTech....I'm just tackling that myself. Make sure you get the right fluid....search RennList for Kevin's (Imagine Auto) comments on the tranny fluid.

 

what ATF to use ? i put MOTUL is bad ?

 

It's not as easy as you think, tranny fluid had to be a certain level as there is a lot of valves within the tranny that work of pressures. You also have to measure at a certain temperature to achieve the correct level.

 

We talking transmission or diffs?

 

automatic transmission

 

I had my dealer do this for me at the last service last month ($450 AUD), as I want to upgrade with turbos/flash/exhaust and don't want the extra power to prematurely wear the auto transmission as fixing is expensive!

 

Looking for a little help:

My 02 Tip (never tracked, stock until 29k miles when I bought it) now has 36k miles. When I had it in to the shop to fix a boost issue, I was told gear changes felt a bit sluggish to them and it tended to "hunt" for the right gear when in auto mode a little too long with variances in throttle pressure. I've never really noticed an issue, but this shop drives lots of Porsches to compare it too. They recommended me to do a tranny/diff fluid flush (the right kind, remove pan, new filter and gasket, ~7 new quarts of fluid out of the 9 it holds, NOT just the 3.5 quart drain). For this, they want $240 in labor, $71 filter, $15 gasket, and 7 quarts of either Fuchs or Titan trans fluid, total of about $400 + tax for all this.

How often should the tranny/diff oil be changed on a non track car? I cannot find any records of a transmission fluid change on my 36k mile 02 996tt Tip, so am assuming it has never been done. Is there danger in waiting until maybe 38-40k miles when I need new tires in the late spring put on as well to kill two birds at once, or am I risking damage to the transmission? I know Porsche's book says like 100-120k mile intervals, but I'm not sure the age wise (probably 3-4 years, and this is now a 10 year old car). BTW, it's a tuned car w/ europipe loud exhaust, otherwise mostly stock power wise, and never tracked, but definately not babied on the road.

I'd love to be able to do this myself, but I get the feeling to save $240 in labor, I better not mess with it since I've never done it before and I'll end up a freezing, oily mess in the garage. The only DIY I found was for a manual anyway, and only showed how to drain it to get the ~3.5 quarts out, not the pan removal method with new filter/gasket to get ~7 quarts out (it holds 9 quarts IIRC, and IMO doing just the 3.5 quart drain is a waste of time). http://www.renntech.org/forums/tutor...-instructions/

TIA.

 

Changing the ATF has to be done at precise operating temp of the ATF. If the process is not performed correctly, then even 200ml of ATF either under or over can cause numerous issues with slippage. Doing an ATF and filter change is recommended at 96k. Most experts advise is not to do this unless absolutely necessary. The issue is that when you do this, you can disturb particles in the gearbox that you don't won't todo as it can actually cause more issues than cures.

 

Thanks. So now, at 36k miles, I'm wondering if I should have the shop do it at all? Like I said, I don't really notice an issue, but they say it is shiffting a little sluggish and hunting a bit for gear changes under throttle pressure changes.

 

I for one do not beleive all fluids last 100,000 miles (regardless if you track or don't track the car). Automatics have lots of wear parts in them that contaminate the fluid. Time also reduces a fluid's efficiency. For a tiptronic I'd do it every 5 years or 50K. It's cheap insurance. For a manual tranny every 10 years or 50K unless you track it as heat destroys lubricants. PCNA also say the coolant last forever. Nothing last forever. Change it every 50K or 10 years (or when the stupid glued in water manifold fittings come loose, which you should change anyway the first time you change the clutch assembly). Change all the hoses and belts every ten years regardless of milage.

 

Thanks.

Not exactly "cheap" for $450 after tax + PITA factor, but compared to the $10k-$17k (used/new) tiptronic transmission, I guess cheap. I guess it has likely been 10 years and I should just have it done soon.

 

Did not want to start a new thread - so sorry for resurrecting an old one. I've been doing a lot of research through google searching but couldn't find exactly the answer to my issue.

I bought the c2 99 with 13k miles on it I need to just top up my tranny fluid/oil. Since I don't know what type or kind of tranny fluid the former owner or shop used for it, what is the safest tranny fluid I can use to top up? motul, mobil 1 synthetic / non synthetic? I do not have access to swepcos or redline or pentosins products where i am on the other side of the big pond) help please. TIA!

 

My advice is to have the fluid/filter changed and refilled with the proper Porsche ATF fluid. Then you know what fluid is in there.